1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673e1c16ed87df6fcf9c19d99ebfc65e0d80213a7e2c8106cbcef79c4cde34ab. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9051a8a-36ed-453c-bc5e-6c5679a4ccf6.json and https://artists.proofprofile.net/proofs/artist/e9051a8a-36ed-453c-bc5e-6c5679a4ccf6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dhi Laamar (feat. A. Missoum et son orchestre) [Mono Version]
Yellis Ammi / Ads Eddounnits (feat. A. Missoum et son orchestre) [Mono Version]
Khezryid / Azzine Ouel Fen (Mono Version)
Aich Oussanik / Anoua Idlakhyar (Mono Version)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7590544e9140d146d4fbec8d17ccb7e4508bac6ef8b5510123e04337e27f9c8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR43D2201124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc222db99fc8c58dd16c389b81fafe7fedef2b9c2c7ee8e08b91e8d65888d2d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRS182106210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcba41493323290e01da71c7b926c3569743d233ba26db429736a955e17a421. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRS182106136.
Sligh iyema (Le maître de la chanson kabyle)
Cherif Kheddam (Le grand maître de la chanson kabyle), Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ac8bcded0709f4657fc44b30dd693d563f395e28d5e7eaf4eacd0e75a0b7d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR43D1500735.